A kind of start-up method of FCC gasoline hydrogenation catalyst

A gasoline hydrogenation and catalyst technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of large octane number loss and long start-up period, so as to reduce octane number loss and avoid overheating Risk, the effect of shortening the start-up period

Active Publication Date: 2016-06-08
PETROCHINA CO LTD
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Problems solved by technology

[0008] Aiming at the problems of runaway temperature, long start-up period, and large loss of octane number in the start-up process of the FCC gasoline hydro-upgrading unit, the present invention uses a one-stage catalyst presulfurization during the start-up process of high-olefin, high-sulfur full-fraction FCC gasoline, The method of vulcanizing the second-stage catalyst during the start-up process solves the above technical problems well

Method used

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  • A kind of start-up method of FCC gasoline hydrogenation catalyst
  • A kind of start-up method of FCC gasoline hydrogenation catalyst

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Embodiment 1

[0038] The catalyst used is the same as that of Comparative Example 1, and its vulcanization conditions and start-up conditions are the same as those of Comparative Example 1. However, the sulfurization process is only for the first-stage catalyst, and the second-stage catalyst is not sulfided. After the first-stage vulcanization is completed, the first-stage bed temperature is reduced to 190℃, The temperature of the stage bed is raised to 320°C to prepare FCC raw materials directly. The highest temperature of the bed during the whole oil injection process rises by 50°C, and it enters a stable operation state for 36 hours.

[0039] Table 5 Property analysis of hydrogenation products

[0040] RON

[0041] Compared with the above-mentioned start-up method, this method has the advantages of low bed temperature rise, small octane number loss, and quick entry into stable operation cycle.

Embodiment 2

[0043] One-stage selective hydrodesulfurization catalyst composition: MoO 3 15wt%, CoO1.5wt%, K 2 O0.8wt%, MgO1.8wt%, the balance is modified alumina. Second stage octane recovery catalyst: MoO 3 7%, CoO4%, 65% of modified HZSM-5 zeolite, the remainder is Al-Ti composite oxide binder, and the operating conditions are implemented in accordance with Example 1. The method of one-stage vulcanization and two-stage direct injection without vulcanization is different from Example 1 in that the vulcanization method adopts dry vulcanization. The specific conditions are as follows: the hydrogen sulfide concentration is between 3000-20000 ppm. The vulcanization conditions are commonly used in the field, such as: 40°C nitrogen drying for 10 hours, switch hydrogen and increase the temperature of the vulcanizing agent bed to the temperature at which the vulcanizing agent begins to decompose, and increase it to 180 at a heating rate of 20°C / h ℃ and constant temperature for 5h, 20℃ / h heating r...

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Abstract

The invention relates to an operation start method of a FCC gasoline hydrogenation catalyst. In the operation start method, a first-section catalyst is pre-vulcanized during an initial stage of operation start so that a best hydrogenation activity of the first-section catalyst is achieved. A second-section catalyst is gradually vulcanized during the operation start by hydrogen sulfide generated by vulcanization of the first-section catalyst. By means of the method, a temperature runaway risk due to excessive high activity of a catalyst during the initial stage of the operation start of the catalyst, thereby reducing loss of octane number due to the excessive high initial activity of the catalyst during the initial stage of the operation start.

Description

Technical field [0001] The invention relates to a method for starting an FCC gasoline hydrogenation catalyst, which is particularly suitable for starting a method for high-sulfur and high-olefin FCC raw materials. Background technique [0002] In order to reduce the emission of harmful substances in automobile exhaust, the country has increasingly higher requirements for the sulfur content and olefin content in gasoline. In 2010, Beijing, Shanghai, and Guangzhou have begun to implement the National IV standard, and by 2015, the National IV standard will be implemented nationwide. In view of the current situation that FCC gasoline accounts for 70% of the current domestic gasoline pool, FCC gasoline hydro-upgrading technology will become an important means for China's gasoline upgrade in the next few decades. [0003] In the field of FCC gasoline hydro-upgrading abroad, represented by Prime-G technology successfully developed by IFP, it adopts the technical route of hydrogenation pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04
CPCC10G65/04C10G2400/02
Inventor 王廷海李自夏钱颖常晓昕向永生颉伟王宗宝马好文林宏瞿朝霞王书峰
Owner PETROCHINA CO LTD
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